Manufacture of bent tubing.



No. 702,125. Patented June 10,1902.

J.P.BUCKLEY. I

MANUFACTURE OF BENT TUBING.

(Application filed Jan. 4, 1901.)

(nu mm.

' WITNESSES I 2 Attorneys.

vcation.

UNITED STATES "PATENT OFFICE.

JAMES P. BUOKLEY, OF DETROIT, MICHIGAN.

MANUFACTURE OF BENT TUBING.

SPECIFICATION forming part of Letters Patent No. 702,125, datedJune 10, 1902, Application filed January 4, 1901. Serial No. 42,094. (No model.)

To all whom it may concern Be it known that I, JAMES- P. BucKLnY,

citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in the Manufacture of Bent Tubing; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the'same, reference being had to the accompanying drawings, which form a part of this This invention relates to the manufacture of bent pipes or bent tubing adapted to be used as parts of the piping in water distribution or steam distribution; and'it-hasfor its object an improved construction of bent piping easily and cheaply made, requiring less material in construction, and less laborin construction than the cast pipes or tubes heretofore in common use for the same purpose.

The structure shown in the drawings, illustrative of this invention and which forms part of this application, is a trap; but the invention may be applied to any analogous'bent pipe or benttube.

In the drawings, Figure 1 is a side elevation of the completed trap. Fig. 2'ishows the form of the blank from which one side of the trap is made. Fig. 3 shows the several parts of a completed trap as they appear before they are finally assembled and fastenedtogether.

A indicates the blank, which is cut from thin sheet metal, such as thin sheet-steel, to a shape and size proper for the structure to be made from it. In length it corresponds with the length of the tube to be made, across each branch a or b it corresponds to about the length of the semicironmference of the tube to be made, and Where there are bends it corresponds to the semicircumference in the tube around the, bend as near. as itmay' be. In the subsequent operation the blank is drawn some and eventually is trimmed, so that the blank need notbe out with accuracy, but only approximate accuracy.

The blank A is placed between a matrix-die and a' punching-die and shaped to the form of a half of the bent tube which is to be constructed. If the tube is one that is not symmetricahsuch as is the one shown inthe drawings, two parts are made, a right and a left, each'of which requires its own independent matrix -',die and its own independent punching-die. The two parts A and A are trimmed along those edges which are to meet,

so that the edges are on radial lines or on a diameter of the'completed structure. There are also formed binding-rings for the ends of the tube and a binding-ring or binding-rings for any month of the tube other than those at the ends. For example, a ring Bis formed of a size to engage snugly over the assembled ends a and a, of the two halvesA and A, and

a similar ring 0 is formed to engage over the ends 0 c. A ring of similar character D is arranged to engage over the opening E at the bottom of the trap over the neck parts 6 and eZ These rings may be plain or threaded. Preferably in the first instance they are plain and threaded after the subsequent operation. The parts of the bent tube having been construct- ;ed, brought by the proper workmanship to the desired shape, or put together and held together by forcing the rings B on the neckaot,

the ring U on the neck a c, and the'ring D on the neck 6 e, these rings will hold the parts together, but not securely, and the joint is not yet either water, or air, or gas tight. The next process consists in brazing the joint running "between the rings and the neck'with the brazing compound, and as soon as thearticleis removed and is cool it is a perfect closed bent tube, of which the seams are closed by brazing and of which the ends and any opening are held by hoops or rings.

If the brazing has been properly done, the

entire surface of thearticle, inside and out,

has been covered with a thin coating of the brazing compound, which effectually protects the metal from the corrosive action to which it would ordinarily be liable-such, for instance, as the action of water on corroding shaped to produce when assembled the comiron or steel articles. plete tube, and having the ends bound by 15 For purposes of ornamentation the article rings, said tube having the various parts thus produced is preferably polished and united together and the surface covered with 5 coated with a plating of nickel or some simibrazing material bybeingdippedin the molten lar ornamental metaL. brazing material, substantially as described.

lVhat I claim is- In testimony whereof I sign this specifica- 2o 1. A bent tube made in two symmetrical tion in the presence of two witnesses. parts joined together edge to edge, bound by T [O hoops at their ends and united along their JAMES BUCKLEL long meeting edges by brazing, substantially Witnesses: as described. NETTIE V. BELLEs,

2. A tube constructed of symmetrical parts MAY E. KOTT. 

